Yazaki Senior Design Engineer Interview Questions and Answers

Q1. What are factore that affecting the NVH
Ans. 
Factors affecting NVH include vehicle design, materials used, engine type, and road conditions.
• Vehicle design: Shape, size, weight distribution

• Materials used: Quality of materials, insulation

• Engine type: Number of cylinders, power output

• Road conditions: Smoothness, tire type
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Q2. Noise, Vibration, and Harshness (NVH) in gearboxes are influenced by several factors, which can broadly be categorized into design, material, manufacturing, and operational factors. Here are some key facto...read more
Ans. 
Addressing NVH in gearboxes involves optimizing design, material, manufacturing, and operational factors.
• Optimizing gear geometry like tooth profile and helix angle can reduce noise.

• Proper material quality and heat treatment can minimize vibrations.

• Precision machining and assembly quality are crucial for reducing NVH.

• Consider load conditions, lubrication, and operational speed for NVH control.

• Environmental factors like...read more
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Q1. Design and calculations
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Q1. Experience details and salary discussion
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Find midpoint, Centroid of part in a geometry, find shear stress and bending moment. Nx part file extension name
Question about injection molding. Tool concept of injection molding. Some basic gd&t concepts.

Q1. Be confident and do the tool test to the best of your capacity
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Q2. Show your interest in the company and answer straight to the point.
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Q1. Design using nx
Ans. 
Design using nx
• NX is a powerful CAD software used for designing

• It offers a wide range of tools and features for creating complex designs

• Examples of designs that can be created using NX include automotive parts, machinery, and consumer products
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Q1. About projects and personal questions
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Q1. Explain Free body Diagram ?
Ans. 
Free body diagram is a visual representation of all the forces acting on an object in a given situation.
• It shows all the forces acting on an object as vectors, with arrows indicating the direction and magnitude of each force.

• The object of interest is represented as a point or a simple shape, with all external forces acting on it shown around it.

• Internal forces within the object are not shown on a free body diagram.

• Free...read more
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Q2. What is the working principle of a brake system ?
Ans. 
A brake system works by converting kinetic energy into heat energy through friction to slow down or stop a vehicle.
• Brake pedal is pressed by the driver

• Brake fluid is compressed in the master cylinder

• Pressure is transmitted through brake lines to the brake calipers or wheel cylinders

• Brake pads or shoes press against the brake rotor or drum to create friction and slow down the vehicle
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Q1. What is Stack up tolerance ?
Ans. 
Stack up tolerance refers to the accumulation of tolerances in a series of components or parts that are assembled together.
• Stack up tolerance is important in ensuring that all components fit together properly in an assembly.

• It involves considering the individual tolerances of each component and how they may add up or cancel out when assembled.

• For example, if a shaft has a tolerance of +/- 0.1mm and a hole has a toleran...read more
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Q2. What is the difference between cylindricity and roundness in GD&T ?
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Cylindricity refers to the overall 3D form of a cylinder, while roundness refers to the deviation of a circle from a perfect circle.
• Cylindricity is a 3D tolerance that controls the overall form of a cylinder, ensuring that all points on the surface lie within a specified tolerance zone.

• Roundness is a 2D tolerance that controls the deviation of a circle from a perfect circle, ensuring that the entire circle lies within ...read more
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Q1. Create 3d model for the given engineering drawing ?
Ans. 
To create a 3D model from an engineering drawing, use CAD software to accurately replicate the dimensions and features.
• Use CAD software such as AutoCAD, SolidWorks, or Fusion 360 to create the 3D model.

• Refer to the engineering drawing for dimensions, angles, and features to accurately replicate in the 3D model.

• Utilize tools within the CAD software to create extrusions, cuts, fillets, and other features as needed.

• Check ...read more
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Q2. Do drafting for the given 3d model ?
Ans. 
Yes, I can create detailed 2D drawings based on the 3D model provided.
• Create orthographic views (top, front, side) of the 3D model

• Include dimensions, annotations, and tolerances in the drawings

• Generate section views to show internal features

• Add surface finish symbols and notes as needed
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Q1. CAD test will be there and Interview questions related to interior/exterior with respect to Design rules , Homologation
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Q1. Design rules related, master section related, Homologation related
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Q1. What are the different types of Snap fits used in plastics
Ans. 
Snap fits are used in plastics to join two parts together without the need for additional fasteners.
• Cantilever snap fit

• Annular snap fit

• Torsion snap fit

• Snap hinge

• Snap bead

• Snap tab

• Snap lock

• Snap latch

• Snap hook
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Q2. What is Remastering in plastics
Ans. 
Remastering in plastics is the process of improving the quality of recycled plastic materials.
• It involves adding new additives to the recycled plastic to enhance its properties.

• The process can also involve removing impurities and contaminants from the recycled plastic.

• Remastering helps to increase the value and usability of recycled plastic materials.

• Examples of remastered plastics include PET bottles, HDPE containers,
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